127620138 has 8 divisors (see below), whose sum is σ = 255240288. Its totient is φ = 42540044.

The previous prime is 127620137. The next prime is 127620151. The reversal of 127620138 is 831026721.

It is a sphenic number, since it is the product of 3 distinct primes.

127620138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (127620137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10635006 + ... + 10635017.

It is an arithmetic number, because the mean of its divisors is an integer number (31905036).

Almost surely, 2^127620138 is an apocalyptic number.

127620138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127620138 is a wasteful number, since it uses less digits than its factorization.

127620138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21270028.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 127620138 is about 11296.9083381251. The cubic root of 127620138 is about 503.4693883426.

Adding to 127620138 its reverse (831026721), we get a palindrome (958646859).

The spelling of 127620138 in words is "one hundred twenty-seven million, six hundred twenty thousand, one hundred thirty-eight".